kubectl get customized

get nodes with custom-colums

kubectl get nodes -o custom-columns='NAME:metadata.name,'\
'STATUS:status.conditions[3].type,'\
'VERSION:status.nodeInfo.kubeletVersion,'\
'OS-IMAGE:status.nodeInfo.osImage,'\
'CONTAINER-RUNTIME:status.nodeInfo.containerRuntimeVersion'

NAME                                       STATUS   VERSION               OS-IMAGE                         CONTAINER-RUNTIME
ip-10-0-1-121.us-east-2.compute.internal   Ready    v1.21.5-eks-bc4871b   Windows Server 2019 Datacenter   docker://20.10.9

Sorting pods by name

get pods sort by NAME

kubectl get pods --sort-by=.metadata.name

get pods sort by AGE

kubectl get pods --sort-by=.status.startTime 

Customizing the get resource and sorting

get deployments with custom-columns, like: DEPLOYMENT CONTAINER_IMAGE READY_REPLICAS NAMESPACE

kubectl get deploy -o custom-columns='DEPLOYMENT:.metadata.name,'\
'CONTAINER_IMAGE:.spec.template.spec.containers[].image,'\
'READY_REPLICAS:.status.readyReplicas,'\
'NAMESPACE:.metadata.namespace'\
'--sort-by=.metadata.name'

get pods sort-by NODE NAME

kubectl get pods --sort-by=spec.nodeName -o wide

checking pv sort-by capacity

 kg pv --sort-by=spec.capacity.storage

NAME       CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS      CLAIM   STORAGECLASS   REASON   AGE
pv-log-4   40Mi       RWX            Retain           Available                                   27m
pv-log-1   100Mi      RWX            Retain           Available                                   27m
pv-log-2   200Mi      RWX            Retain           Available                                   27m
pv-log-3   300Mi      RWX            Retain           Available                                   27m

checking pv sort-by capacity with custom-columns

kubectl get pv --sort-by=spec.capacity.storage -o custom-columns=NAME:.metadata.name,CAPACITY:.spec.capacity.storage --sort-by=spec.capacity.storage

NAME       CAPACITY
pv-log-4   40Mi
pv-log-1   100Mi
pv-log-2   200Mi
pv-log-3   300Mi

looking for pods without limits and requests

kubectl get pods -A -o custom-columns='NAMESPACE:metadata.namespace,NAME:metadata.name,LIMITS-REQUESTS:spec.containers[*].resources' |grep -v kube-system

NAMESPACE        NAME                                                        LIMITS-REQUESTS
default          app1-6ffdd6cd84-2f4dr                                       map[limits:map[cpu:500m memory:128Mi] requests:map[cpu:250m memory:64Mi]]
default          app1-6ffdd6cd84-vms6d                                       map[limits:map[cpu:500m memory:128Mi] requests:map[cpu:250m memory:64Mi]]
default          app2-d4d554b75-5pz44                                        map[]
default          app2-d4d554b75-7x696                                        map[]